Modular sleeve for protecting, repairing or renovating a pipe

Details Modular sleeve for protecting, repairing or renovating a pipe Modular sleeve for protecting, repairing or renovating a pipe

1998-04-20

1999-11-23

Kashnikow, Andres

Pipes and tubular conduits

Repairing

Patches

285 45, F16L 5516, F16L 1112

Patent

active

059882247

DESCRIPTION:

BRIEF SUMMARY
TECHNICAL FIELD

The present invention relates to protection, repair and renovation of pipes used for carrying water, gas or other fluids, and particularly to a modular sleeve wherein a polymerizable material is injected.


PRIOR ART

Using a sleeve as an injection mould is needed, either to protect the coupling between two pipes, or to seal off a leak in a pipe. The portion to be protected or repaired is surrounded with the sleeve that forms a tight cavity wherein is injected a polymerizable liquid material that, when polymerizing, forms a leak sealing or thermal and chemical insulation, anti-shock coating.
Sleeves used in prior art, as set forth for example in patents FR 2.158.895, EP 278.050, U.S. Pat. No. 4,610,740 or GB 2.119.884, are composed of two cylindrical half-shells linked to form only one shell that covers the pipe portion to be protected or repaired. Then, the polymerizable liquid material (generally made up of epoxy or polyurethane resin components) is poured through an injection hole provided for in the shell wall into the cavity thus formed.
These sleeves composed of two half-shells are thus suitable for a pipe having a given diameter. Therefore, it is necessary to have sleeves with various diameters capable of fitting the various pipe diameters. That way, various moulds are required to manufacture half-shells with diameters matching all pipe diameters, what leads to a prohibitive cost.


SUMMARY OF THE INVENTION

This is why the object of the invention is to provide a sleeve made up of identical modules requiring only one module manufacturing mould, such a sleeve being capable of fitting pipes having various diameters through the use of the proper number of sleeve modules.
The invention relates therefore to a sleeve meant for protecting, repairing or renovating a pipe carrying water, gas or other fluids, forming an injection mould surrounding the pipe portion to be protected or repaired, wherein are injected the components of a liquid polymerizable material that, when polymerizing, provides protection or sealing of the covered pipe portion, said sleeve being made up of a plurality of modules each comprising male, female, and intermediate parts, the male part of a module being designed to fit partially or totally into the female part of the adjacent module so as to adjust the sleeve to said pipe whose diameter is located within a given range.


BRIEF DESCRIPTION OF THE DRAWINGS

The objects, features and other characteristics of the invention will become more apparent from the following detailed description with reference to the accompanying drawings, in which:
FIG. 1 shows in broad outline a modular sleeve covering a pipe portion to be protected or repaired,
FIG. 2 is a top view of a sleeve module according to a preferred embodiment of the invention,
FIG. 3 is a side view, with partial cross-sectional view, of a sleeve module according to a preferred embodiment of the invention,
FIG. 4 shows in broad outline the cross-sectional view of a fastening portion located on both sides of the module, and
FIG. 5 shows in broad outline two modules fitted together to make up a sleeve according to the invention.


DETAILED DESCRIPTION OF THE INVENTION

FIG. 1 shows in broad outline a sleeve 10 covering a portion of a pipe 12 that requires either to be protected (coupling between two pipe ends), or to be repaired (leak).
The sleeve 10 shown on FIG. 1 is made of plastic and is composed of a plurality of identical modules such as modules 14, 16, 18, 20, and 22. A part of each module is fitted into its adjacent module. This way, the module 18 has a part shown as the dotted line 24 fitted into the module 16, the module 20 has a part shown as the dotted line 26 fitted into the module 18, etc.
The following description relates to the structure of each module shown in top view on FIG. 2 and in side view on FIG. 3.
Each module that makes up the sleeve comprises a central portion 28 that forms a part of the mould wherein the polymerizable material is injected, two symmetrical tightening portions 30 and 31 on b

REFERENCES:
patent: 1510483 (1924-10-01), Lang
patent: 1698967 (1929-01-01), Reading
patent: 4073841 (1978-02-01), Dultgen et al.
patent: 4585091 (1986-04-01), Budd
patent: 4607866 (1986-08-01), Erlichman
patent: 4752208 (1988-06-01), Iwata et al.
patent: 5115048 (1992-05-01), Maeda et al.

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